Research on the Cell Model of the Matrix in Infiltration-Type Self-Lubricating Composites

This study investigates the pore structure of the matrix in infiltration-type self-lubricating composites prepared via powder metallurgy sintering. A unit cell model of the pore structure is established based on homogenization theory and the finite element analysis method, assuming a periodically distributed porous matrix composed of uniformly sized micropores. Using ANSYS software, the effects of structural parameters, particularly porosity, on the elastic modulus, Poisson’s ratio, and compressive strength of the composite are systematically analyzed. The results indicate that as porosity increases, the relative elastic modulus decreases, while Poisson’s ratio increases. To ensure a balance between mechanical and self-lubricating properties, the optimal porosity range is determined to be 15%–30%. This research provides a theoretical foundation for optimizing the structural design of infiltration-type self-lubricating composites.